A fireworks display Friday at the Alameda County Fair in Pleasanton, California drew crowds of people -and yellow jackets! A swarm of insects stung fairgoers when their nest was disturbed.

The wasp attacks began shortly after the fireworks show started at 9:15 p.m. About 5,000 people were in the grandstands, and 15 minutes later sting victims started showing up in the first aid area, Knowles said.

"Apparently there were a number of (yellow jackets) also in attendance for the fireworks display last night," Knowles said Saturday.

She said emergency personnel at the fair set up a triage area to care for those who were stung. Everyone was treated on site and there were no hospitalizations, Knowles said.

By midnight Friday, an exterminator located and removed a ground nest, Mitchell said. The yellow jackets were probably disturbed by the vibrations as the fireworks were launched, not the explosions overhead, she said.

Strange, yesterday I was being kinda dumb and was throwing fireworks at a wasp nest. I was not stung at all. One hit less than a centimeter away and the wasps didn't attack me. I know that the wasps were alive since they did move away from where the fireworks hit. After reading this I consider myself far more lucky than before.